Comparison

Petoi vs Electronics Circuit Simulator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Petoi

Configure and control your robot pet toys with this official app. Calibrate joints, perform pre-set actions, and create custom movements. Compatible with Bittle and Nybble robot pets.

Highlights
  • Easy joint calibration
  • Control robot movement and actions
  • Create custom robot commands
  • Share custom commands with community
  • Compatible with Bittle and Nybble robots
Read full description

The official app for configuring and controlling Petoi's robot pet toys. Features: -- easy calibration interface to make the robot's joints aligned correctly. -- control robots to move with different walking speeds and default actions such as push-up, greetings, stretches, and rest. Great for playing games with your friends and families. -- add custom actions (commands) to your robots to achieve more advanced maneuverability and motions - you may share your customized commands with our community @PetoiCamp. Compatible Petoi robot pets: robot dog Bittle, robot cat Nybble Petoi robot pets are cute, realistic, open-source, palm-sized, compatible with Arduino modules, programmable, and can support Raspberry Pi. Support: official website: www.petoi.com support email: support@petoi.com Support forum: www.petoi.camp/forum

About

Electronics Circuit Simulator

Features
Read full description

This app is a complete electronics workbench on your iPhone and iPad. Build circuits on an interactive schematic editor, simulate them with real Modified Nodal Analysis, and learn electronics through hands-on exploration. VERSION 2.0 — WHAT'S NEW: CIRCUIT CHALLENGES Test your electronics knowledge with 9 interactive puzzles across 4 categories — Basics, Analysis, Design, and Troubleshooting. Each challenge provides a starting circuit you must modify to meet specific goals, with built-in validation that checks your simulation results. ELECTRONICS CALCULATOR Seven quick-access calculators: Ohm's Law, Voltage Divider, RC Time Constant, LED Resistor Sizing, Power Dissipation, Parallel Resistance, and Series Capacitance. All with real-time results in engineering notation as you type. OSCILLOSCOPE VIEW Dual-channel waveform visualizer with sine, square, triangle, and sawtooth signals. Adjustable frequency, amplitude, DC offset, and timebase — complete with graticule, tick marks, and measurement readouts for Vpp, Vrms, frequency, and period. CORE FEATURES: Schematic editor with tap-to-place components and L-shaped auto-routing wires DC circuit simulation using Modified Nodal Analysis with Newton-Raphson iteration 50+ electronic components across 10 categories 20+ pre-built common circuits ready to load and simulate Virtual multimeter with voltage and current probes Undo support, save/load circuits, rotate and edit component values Comprehensive Electronics Guide covering fundamentals, components, formulas, and safety Interactive tutorial for new users Built entirely in SwiftUI. No internet connection required. No ads. No subscriptions.

Screenshots

Petoi4 screens
Electronics Circuit Simulator4 screens

Verdict

The call

The clearest difference is price: Petoi at Free against Electronics Circuit Simulator's $2.99. Petoi also leads on iOS requirement (15.6 vs 17.0). Electronics Circuit Simulator's advantage is update cadence (monthly vs every 4 months). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Petoi is free to download; Electronics Circuit Simulator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Petoi ships an update every 4 months, Electronics Circuit Simulator monthly. The most recent releases landed on July 5, 2026 and September 21, 2026 respectively.

Scorecard3 real differences · 7 level
Petoi versus Electronics Circuit Simulator: the parameters behind the verdict, then further details
ParameterPetoiElectronics Circuit Simulator
PriceFree — better$2.99
Rating4.5 (13 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings13 — better—
Update frequencyEvery 4 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size41 MB5 MB
Age rating4+4+
DeveloperPetoi LLCYuhsiu Lai

In-app purchases

None

Petoi

No in-app purchases

None

Electronics Circuit Simulator

No in-app purchases

Questions

Is Petoi free?
Petoi is free to download, with no in-app purchases.
Is Electronics Circuit Simulator free?
Electronics Circuit Simulator costs $2.99, with no in-app purchases.
Do Petoi or Electronics Circuit Simulator have ads?
Neither Petoi nor Electronics Circuit Simulator shows ads.
Which is updated more often, Petoi or Electronics Circuit Simulator?
Petoi ships an update every 4 months, and Electronics Circuit Simulator monthly. Most recently, Petoi was updated on July 5, 2026 and Electronics Circuit Simulator on September 21, 2026.

Other comparisons